from Mr305:
This is ONLY A PATCH. This wont function without the entire package which can be downloaded here:
http://pspupdates.qj.net/PSP-Updates-Summer-Homebrew-Contest-PSP-Hardware-Alarm-Suite-II-v2-7-bld1727/pg/49/aid/123973

Changelog:
You can now cancel Alarm Once it is set by Pressing RTRIGGER; This bug accidentally crept in due to a last minute change to my PSPUpdates Compo Entry Version (the latest version to date).